Re: Overboost? Oil Surge? - Saab 9000 Bulletin Board - Saabnet.com
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Re: Overboost? Oil Surge?
Posted by Winder (more from Winder) on Fri, 6 Dec 2002 12:55:11
In Reply to: Overboost? Oil Surge?, mark, Fri, 6 Dec 2002 10:22:14
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I would say what you're experiencing is perfectly normal. After your tune up it's probably running correctly. In a manual trans this happens every time you drive. The boost goes way into the red and then it senses a knock and then backs out of it a bit. If I'm not mistaken, you are probably getting the maximum boost in 3rd gear at around (2500-3500 rpms) since 1st and 2nd are too low to generate the load necessary, and boost tapers off above 4000, so it makes sense it would happen in that gear. In 4th, boost remains on long enough to even out. I'd say enjoy and not worry about it unless it really cuts out-that would be the fuel shut off, that may indicate another problem.
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